One of the deployed monitors was unfortunately subjected to water when we had some particularly strong weather. The wind caused the tripod that was weighed down with sand bags to fall over, leaving the bottom of the case with large opening tilted up towards the rain. The pictures show the destructive results to the electronics. The fan probably helped blow in some water and fling it around until it failed.

Plenty of oxidation next to the power connector....

The arduino mega and sensor boards...

RIP...